Abstract #4117

Correction of B0 Inhomogeneities-Induced Artifacts in EPI for Breast Imaging

Ana Rodríguez-Soto¹, Helen Park², Dominic Holland³, Hauke Bartsch¹, Haydee Ojeda-Fournier¹, Anders Dale¹, and Rebecca Rakow-Penner¹

¹Radiology, University of California, San Diego, La Jolla, CA, United States, ²School of Medicine, University of California, San Diego, La Jolla, CA, United States, ³Neuroscience, University of California, San Diego, La Jolla, CA, United States

Echo-planar imaging (EPI) is prone to B₀ inhomogeneities that arise from susceptiblity effects resulting in spatial distortions more pronounced in the phase-encoded (PE) direction. Reduction and correction of such distortion artifacts are performed in both acquisition and post-processing stages. The present work evaluates the combined effect of a field-of-view (FOV) optimized and constrained undistorted single-shot (FOCUS) EPI and a distortion correction approach to that exploits the symmetry of the artifact on EPI images acquired with opposite PE polarities. After distortion correction good agreement was found between corrected EPI datasets and anatomical images.

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